A kind of processing method of hydroxylamine waste water

A treatment method and hydroxylamine technology, applied in water/sewage treatment, water/sewage multi-stage treatment, special compound water treatment, etc., can solve the problems of high cost and large dosage

Active Publication Date: 2021-08-17
ZHEJIANG GUOBANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above-mentioned defects existing in the treatment of existing hydroxylamine wastewater (including wastewater containing hydroxylamine and wastewater containing hydroxylamine salts), the application provides a method for effectively removing hydroxylamine components in wastewater and overcoming the dosage of other materials in the prior art. Large, costly defects

Method used

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  • A kind of processing method of hydroxylamine waste water
  • A kind of processing method of hydroxylamine waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the treatment that contains hydroxylamine wastewater

[0020] Take 100g of wastewater containing hydroxylamine, the concentration of hydroxylamine is 5%, adjust the pH value to 7 with hydrochloric acid, add 0.2g of ferric chloride hexahydrate (containing 0.04g of ferric ion), stir for 0.5 hours, and slowly add 4g of it dropwise with a dropping funnel Hydrogen peroxide (30% concentration), during the dropping process, pay attention to controlling the rate of adding hydrogen peroxide, observe the temperature change of the feed liquid and the foam generated during the reaction, and prevent the temperature from being too high and the reaction speed from being too fast to cause the material to rush. After the dropwise addition, the stirring was continued until the exothermic reaction basically stopped, and the concentration of hydroxylamine was 0.002% for detection by sampling.

Embodiment 2

[0021] Embodiment 2: the treatment that contains hydroxylamine wastewater

[0022] Take 100g of wastewater containing hydroxylamine, the concentration of hydroxylamine is 10%, adjust the pH value to 6 with sulfuric acid, add 1.0g of ferric chloride hexahydrate (containing 0.21g of ferric ion), stir for 0.5 hours, and slowly add 8g of it dropwise with a dropping funnel Hydrogen peroxide (30% concentration), during the dropping process, pay attention to controlling the rate of adding hydrogen peroxide, observe the temperature change of the feed liquid and the foam generated during the reaction, and prevent the temperature from being too high and the reaction speed from being too fast to cause the material to rush. After the dropwise addition, the stirring was continued until the exothermic reaction basically stopped, and the concentration of hydroxylamine was 0.003% for detection by sampling.

Embodiment 3

[0023] Embodiment 3: the treatment that contains hydroxylamine wastewater

[0024] Take 100g of wastewater containing hydroxylamine, the concentration of hydroxylamine is 8%, adjust the pH value to 6.5 with hydrochloric acid, add 1.1g of ferric chloride hexahydrate (containing 0.24g of ferric ion), stir for 0.5 hours, and slowly add 5g of it dropwise with a dropping funnel Hydrogen peroxide (30% concentration), during the dropping process, pay attention to controlling the rate of adding hydrogen peroxide, observe the temperature change of the feed liquid and the foam generated during the reaction, and prevent the temperature from being too high and the reaction speed from being too fast to cause the material to rush. After the dropwise addition, the stirring was continued until the exothermic reaction basically stopped, and the concentration of hydroxylamine was 0.004% for detection by sampling.

[0025] Embodiment 1-3 is three schemes of our scheme as representative, in test ...

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Abstract

The application relates to a method for treating hydroxylamine wastewater, which belongs to the technical field of water, wastewater or sewage treatment. Adjust the pH of the hydroxylamine wastewater to be treated to 2‑8; add a catalyst amount of ferric ion components and stir, wherein the catalyst amount refers to the weight of the ferric ions being 0.5‑5% of the weight of the hydroxylamine components; add hydrogen peroxide dropwise And stir until the system has no obvious exotherm, and the reaction ends. Applying the application to the treatment of hydroxylamine wastewater has the advantages of low residual rate of hydroxylamine, low cost, less solid waste, and simple post-treatment.

Description

technical field [0001] The application relates to a method for treating hydroxylamine wastewater, which belongs to the technical field of water, wastewater or sewage treatment. Background technique [0002] Hydroxylamine is generally used as a reducing agent in organic synthesis, and its reaction with carbonyl compounds to generate oximes is widely used in chemical synthesis. For example, caprolactam is formed by reacting cyclohexanone with hydroxylamine to form cyclohexanone oxime, and then undergoes Beckmann rearrangement reaction to obtain caprolactam. Hydroxylamine is also an important raw material for the preparation of pharmaceutical intermediates, such as the macrolide product produced by our company. The first step reaction of this product is the reaction of erythromycin A and hydroxylamine to form erythromycin oxime. [0003] Hydroxylamine is a low-cost chemical raw material. In order to ensure the full utilization of other compounds during the oximation reaction w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/16
CPCC02F1/66C02F1/722C02F1/725C02F2101/16C02F2305/02
Inventor 金勇李广青张承群邵昌哲尤启冬余辉龙侯仲轲姚礼高孟仲建
Owner ZHEJIANG GUOBANG PHARMA
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